Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5YBX callsign genealogy
Currently held by SINCLAIR, RICHARD J
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K5YBX's current licensee, walking backwards.
- SINCLAIR, RICHARD JTXgranted 2003-08-12cancelled 2006-05-19
Successor callsigns
Callsigns held now by people who previously held K5YBX.
No current licensee on record previously held this callsign.